Monsignor Pope Ping!
It may not be easy, but it is an act of charity to inform people when their behavior endangers their immortal soul.—Indeed, it is incumbent upon us. Remember the message given to Ezechiel: If, when I say to the wicked, Thou shalt surely die: thou declare it not to him, nor speak to him, that he may be converted from his wicked way, and live: the same wicked man shall die in his iniquity, but I will require his blood at thy hand. But if thou give warning to the wicked, and he be not converted from his wickedness, and from his evil way: he indeed shall die in his iniquity, but thou hast delivered thy soul.